Which process primarily influences fjord deepening as the overlying ice mass undergoes ablation?

💡 Explanation

As a glacier ablates, increased basal water pressure accelerates glacial abrasion, the mechanical wearing of the bedrock by ice and rock debris, deepening the fjord. Therefore enhanced bedrock removal is the primary influence, rather than isostatic rebound, tidal sediment redistribution, or chemical weathering, which have less direct impacts.

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